Lesson plan

10. Compare figures with different attributes (A)

teaches Common Core State Standards CCSS.Math.Content.5.G.B.3 http://corestandards.org/Math/Content/5/G/B/3
teaches Common Core State Standards CCSS.Math.Content.5.G.B.4 http://corestandards.org/Math/Content/5/G/B/4
teaches Common Core State Standards CCSS.Math.Practice.MP3 http://corestandards.org/Math/Practice/MP3

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Lesson objective: Compare figures with different attributes to solve problems.

This lesson provides an opportunity for students to apply their knowledge and understanding of classifying two-dimensional figures to a real-life situation. Students are asked to determine if a collection of different shaped cookies has the attributes belonging to a particular set.

Key Concept students will use: 

  • because figures may belong to categories and subcategories, we can classify figures in a hierarchy based on properties

Skills students will use:

  • understand shapes in different categories (rhombuses, rectangles, etc.) may share attributes; (Grade 3, Unit 13)
  • read and create diagrams to show relationships between categories and subcategories of shapes
  • evaluate hierarchical relationships based on shared attributes

Students engage in Mathematical Practice 3 (construct viable arguments and critique the reasoning of others) as they consider the claims of others in regards to the classification of two-dimensional figures, and make judgements on their reasoning based on their understanding of the classification of plane figures.

Key vocabulary: 

  • attribute
  • hierarchy
  • kite
  • parallelogram
  • quadrilateral
  • trapezoid